Extension and expansion valves



Dec. 17", 1968 B. T. BRIGANDI EXTENSION AND EXPANSION VALVES Filed March 10, 1965 1 NVEN TOR.

BRUNO 7' HOMAS- BRIGANO/ United States Patent 3,416,769 EXTENSIGN AND EXPANSION VALVES Bruno Thomas Brigandi, 2570 Benson Ave., Brooklyn, NX. 11214 Filed Mar. 10, 1965, Ser. No. 438,536 Claims. (Cl. 251-189) ABSTRACT OF THE DISCLOSURE An extension and expansion valve which is adapted to be connected into the main sewer trap of a building and can be used to shut off the drainage system to prevent overflows in the external sewage system from flowing back into the building drainage system and being discharged into various plumbing appliances in the building. The valve has an actuator adapted to be screwed into the leg of the main sewer trap cover opening which is provided with a plug member. This member is outwardly expandable after being extended to shut off position.

Summary 0 the invention My valve has a hollow bottom vertical housing with a hollow expandable flexible vertical cylinder therein provided with upper and lower end covers. A vertical stem rotatable manually about its own axis extends upwardly out of the housing. The cylinder constitutes the plug which is outwardly expanded by a mechanism which moves the top cover toward the bottom cover upon suitable rotation of the stem whereby the cylinder is vertically compressed and expanded radially outward. The reverse action moves the covers apart to relieve the vertical compression and permit radial compression of the cylinder.

Brief description 0) the drawings In the drawings: FIG. 1 is a longitudinal cross section of my valve; and FIG. 2 is a horizontal cross section of a portion thereof.

Detailed description of preferred embodiment Referring now to FIGS. 1 and 2, a vertical hollow housing 12 can be screwed into a suitable opening in one leg by the outer threads in housing 12.

A hollow vertical cylinder plug 14 which is flexible and expandable and open at top and bottom ends is disposed in the housing. The bottom end is sealed by bottom cover 15 and the top end is sealed by top cover 13. A hollow vertical sleeve 8 threadedly engages at its bottom end the top end of housing and extends vertically upward therefrom. A coupling 7 threadedly engages the upper end of the sleeve. A nut sleeve 6 threadedly engages coupling 7. Nut 3 engages sleeve 6 with packing 4 and washer 5 squeezed therebetween.

A second vertical sleeve 9 is disposed within sleeve 8; a third vertical sleeve is disposed within sleeve 9. An axially movable sleeve 11 is disposed within sleeve 10.

A vertical stem 2 extends downwardly through nut 3, sleeve 6, and sleeve 11, through a port in cover 13 into a central or axial position with respect to plug 14. Stem 2 has right hand and left hand threads, one thread holding stem 2 mated to fixed sleeve 6 to seal in gases and water with the aid of Washer 5 and nut 3, the other thread engaging sleeve 11.

Sleeves 9 and 10 are telescopic but non-rotating since sleeve 8 has at its bottom end inside protrusions that mate with vertical cut-outs with extension stop in sleeve 9 and sleeve 9 has at its bottom inside end inside protrusions that mate with vertical cut-outs with extension stop in sleeve 10. The bottom end of sleeve 10 is secured to cover 15. Sleeve 11 protrudes out of vertical cut-outs from inside sleeve 10 to be secured to cover 13.

Patented Dec. 17, 1968 ice The resilient plug unit comprising covers 13 and 15 and cylinder plug 14 by rotation of stem 2, by handle 1, is axially movable within housing 12 and downward therethrough until sleeves 9 and 10 are telescopically downwardly extended; at this point sleeve 11 presses cover 13 downwardly toward cover 15 to outwardly expand plug 14 to fill in the flow opening in the sewer trap and thus prevent flow of water and the like from an external sewage system into a house sewage system.

When the stem is rotated in the opposite direction, first the plug 14 is outwardly contracted by upward movement of sleeve 11 and then the sleeves telescopically contract one upon the other until the plug unit is withdrawn into the housing as shown in FIG. 1.

While I have described my invention with particular reference to the drawings, my protection is to be limited only by the terms of the claims which follow.

I claim:

1. An extension and expansion valve comprising:

a hollow vertical housing open at top and bottom ends;

a plug unit disposed in said housing and including an expandable flexible vertical hollow cylinder having top and bottom covers;

a stern rotatably mounted in the open top end of said housing; and

a connecting means connecting said stem to said plug unit which upon rotation of said stem in one direction first moves said unit vertically downward out of the housing and thereafter moves the top cover toward the bottom cover to produce outward expansion of said plug, said expansion and downward movement being reversible to corresponding inward contraction and upward movement upon reversing the direction of rotation of the stern, continuous rotation of said stem being the sole means for effecting movement, expansion and contraction of said plug.

2. A valve as set forth in claim 1 wherein said mechanism includes a plurality of vertical hollow sleeves disposed one within another and extending out of the housing, said stem extending through the innermost sleeve.

3. A valve as set forth in claim 2 wherein innermost sleeve is movable axially up and down in accordance with rotation of the stem, said innermost sleeve when fully disposed downward having its bottom end bearing against the top cover to move same toward the bottom cover and expand the plug.

4. A valve as set forth in claim 3 wherein said plurality of sleeves is equal to four, the outermost sleeve being fixed in position.

5. A valve as set forth in claim 4 wherein the two inner sleeves disposed between the innermost and outermost sleeves telescope into and out of each other in accordance with stem rotation.

References Cited UNITED STATES PATENTS 1,175,253 3/1916 Fulton 251-265 1,616,392 2/1927 Provost 251191 X 2,867,243 1/1959 Bowan 13889 2,953,154 9/1960 Agoliati 137247.13 3,108,780 10/1963 Wishart M 251189 X FOREIGN PATENTS 1,205,040 10/ 1959 France.

WILLIAM F. ODEA, Primary Examiner.

H. W. WEAKLEY, Assistant Examiner.

US. Cl. X.R. 

